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Elastomeric Composites Containing Modified Fillers And Functionalized Elastomers

Active Publication Date: 2015-07-02
CABOT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides fillers that can improve the hysteresis (the difference between the viscosity at high and low temperatures) and abrasion resistance (the resistance to wear and tear) of elastomeric compositions. The invention also provides methods to achieve a balance of properties between hysteresis and abrasion resistance in elastomeric compositions.

Problems solved by technology

However, in the past, with some elastomeric compositions using fillers, a filler can typically improve one property, but to the detriment of the other property.

Method used

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  • Elastomeric Composites Containing Modified Fillers And Functionalized Elastomers
  • Elastomeric Composites Containing Modified Fillers And Functionalized Elastomers
  • Elastomeric Composites Containing Modified Fillers And Functionalized Elastomers

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of a Carbon Black Product

[0160]This example illustrates the preparation of a carbon black product of the present invention. A carbon black with an iodine number of 119 and a DBPA of 125 mL / 100 g was used. A solution of 2.60 g NaNO2 in 21.7 g of water was added over a period of about five minutes to a stirring mixture of 150 g of the carbon black, 1301 g water, 5.00 g 3-amino-1,2,4-triazole-5-thiol and 5.14 g 70% methanesulfonic acid at 70 C. The mixing was continued for 50 minutes at 70 C. The mixture was cooled to room temperature and adjusted to a pH of 8.1 with NaOH solution. The product was collected by filtration, washed with 2.5 L of water and dried under vacuum at 70 C. The product had 1.53 wt % S. A sample of the carbon black product that had been subjected to Soxhlet extraction with methanol had 0.89 wt % S, compared to 0.65 wt % S for the untreated carbon black. The sample thus had attached and adsorbed triazoles.

example 2

Preparation of a Carbon Black Product

[0161]This example illustrates the preparation of a carbon black product of the present invention. A carbon black with an iodine number of 119 and a DBPA of 125 mL / 100 g was used. A solution of 2.61 g NaNO2 in 23.1 g of water was added over a period of ten minutes to a stirring mixture of 150 g of the carbon black, 1301 g water, 4.31 g 3-amino-1,2,4-triazole-5-thiol and 5.14 g 70% methanesulfonic acid at 70 C. The mixing was continued for an hour at 70 C. The mixture was cooled to room temperature and adjusted to a pH of 7.5 with NaOH solution. The product was collected by filtration, washed with 2.5 L of water and dried under vacuum at 70 C. The product had 1.41 wt % S. A sample of the carbon black product that had been subjected to Soxhlet extraction with methanol had 0.89 wt % S, compared to 0.65 wt % S for the untreated carbon black. The sample thus had attached and adsorbed triazoles.

example 3

Preparation of a Comparative Carbon Black Product

[0162]This example illustrates the preparation of a carbon black product modified using diazonium salts of APDS. A batch pelletizer having a mixing chamber with a 8″ diameter and 8″ length was heated to 60 C and charged with 300 g of a carbon black with an iodine number of 119 and a DBPA of 125 mL / 100 g. 4-Aminophenyldisulfide (19.0 g) and 209 g of water were added. After mixing briefly, 29.0 g of 27.9% sulfuric acid was added. After mixing briefly, 52 g of a 20% solution of NaNO2 in water was added in a few portions, with brief intermediate mixing over five minutes. Water (50 g) was added, and mixing was continued for 30 min at 60 C, and the product was removed from the pelletizer, suspended in 4 L water and filtered. The product was washed with ethanol and then resuspended in 4 L of water. The pH was adjusted to 8 with NaOH solution, and the mixture was filtered and washed until the filtrate had a conductivity of 225 μS / cm. The prod...

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Abstract

Elastomeric compositions are described which have at least one functionalized elastomer and at least one modified filler which has adsorbed and / or attached chemical groups, such as a triazole and / or pyrazole thereon, or other modified fillers which are also described. Methods are further described to improve hysteresis and / or abrasion resistance in elastomeric compositions containing a functionalized elastomer using the modified fillers of the present invention.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to fillers, elastomeric compositions or composites, and methods to make the same, and methods to improve one or more properties in elastomeric compositions. More specifically, the present invention relates to modified fillers and the use of these fillers in elastomeric compositions.[0002]Carbon blacks and other fillers have been utilized as pigments, fillers, and / or reinforcing agents in the compounding and preparation of compositions used in rubber, plastic, paper or textile applications. The properties of the carbon black or other fillers are important factors in determining various performance characteristics of these compositions.[0003]Much effort has been expended over the last several decades to modify the surface chemistry of carbon black. Useful processes for attaching an organic group to carbon black and uses of the resulting product are described, for example, in U.S. Pat. Nos. 5,559,169; 5,900,029; 5,851,280; ...

Claims

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Application Information

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IPC IPC(8): C08K9/04
CPCC08K9/04B60C1/0016B60C1/0025C08K9/12C08L15/00C08K3/041C08K3/042B60C1/00C07D249/08C07D249/12C08K3/04C08K3/36C08K5/34C08K5/3445C08K5/3472C08L23/16C09C1/48
Inventor BELMONT, JAMES A.TIRUMALA, VIJAY R.ZHANG, PING
Owner CABOT CORP
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